Published on in Vol 23, No 4 (2021): April
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/26518, first published
.

1 School of Public Health, Fudan University , Shanghai , CN
2 Department of Infectious Disease Epidemiology, London School of Hygiene & Tropical Medicine , London , GB
3 NHC Key Laboratory of Health Technology Assessment, Fudan University , Shanghai , CN
*these authors contributed equally